The End of Slavery in Africa . It was not until the 1930s that slavery in Africa was almost totally eliminated.

Professor Donald R. Wright reports:

Although colonial authorities began outlawing slavery in some African territories as early as the 1830s, the complete legal abolition of slavery in Africa did not take place until the first quarter of the 20th century. By that time, however, slavery was deeply ingrained in most African societies, and thus the practice continued illegally. Slaves who became liberated often did so by escaping and going to the colonial authorities or by simply leaving the areas in which they had been held to take up residence elsewhere. In some places, enslaved persons held that status throughout their lives, despite the legal prohibition. It was not until the 1930s that slavery in Africa was almost totally eliminated.

It appears white people get out of the slavery racket in North America long before Africa. Just a reminder, the next time your friendly "progressive" lectures you about white privilege.